Brexit can provide them a way to remove that nonsense. I mean they will be free to adjust their local laws away from EU regulations where needed.
The bigger problem about these nag screens is the poor UX. I often just accept the defaults because it is far, far quicker than trying to find the Opt out option. I especially hate sites that then take you to a config screen to pick and choose from providers. All I want is a binary Yes or No, with each option getting equal equivalence in the UI.
That is why opt-out is illegal.
> Many sites outside EU jurisdiction still abide by EU privacy/cookie laws.
is completely wrong. I would not be surprised if those popups put many sites out of compliance because they mean that the site is targeted at EU citizens.